package com.liang.lesson1;

import java.sql.*;

public class JdbcFirstDemo {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        // 1.加载驱动
//        DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//        Class.forName("com.mysql.jdbc.Driver");//固定写法，加载驱动
        // 2.用户信息和url
        String url = "jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true&characterEncoding=utf8&useSSL=true";
        String username = "root";
        String password = "123456";
        //3.连接成功,数据库对象
        Connection connection = DriverManager.getConnection(url, username, password);

        // 4.执行SQL的对象
        Statement statement = connection.createStatement();





        // 5.执行SQL的对象去执行SQL，可能存在结果，要查询返回结果
        String sql = "SELECT * FROM `users`";
        ResultSet resultSet = statement.executeQuery(sql);




        while (resultSet.next()){
            System.out.println("id=" + resultSet.getObject("id"));
            System.out.println("name=" + resultSet.getObject("NAME"));
            System.out.println("pwd=" + resultSet.getObject("PASSWORD"));
            System.out.println("email=" + resultSet.getObject("email"));
            System.out.println("birthday=" + resultSet.getObject("birthday"));
            System.out.println("===========");
        }
        //6.释放连接
        resultSet.close();
        statement.close();
        connection.close();
    }
}